<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <ol>
        <li>List item 1</li>
        <li>List item 2</li>
        <li>List item 3</li>
    </ol>
    <button>删除列表元素</button>

    <script src="jquery-3.7.1.min.js"></script></body>
    <script>
        $(document).ready(function() {
            $("button").click(function() {
                $("ol").empty();
            });
        });
    </script>
</body>
</html>